[System] Screen Smearing / Frame Buffer Ghosting on Kubuntu 26.04 (Wayland)

[Trinity-108]

• CPU: Intel Core i3-8100 (Coffee Lake)
• RAM: 8GB (4+4 DDR4)
• GPU: Intel UHD Graphics 630
• Storage: SATA SSD + HDD
• OS: Kubuntu 26.04 (Plasma 6 - Wayland)

The Problem: I am seeing "screen smearing" or a "ghosting effect." When I switch windows or close a browser, the previous window remains visible for a few hundred milliseconds as a partial image. It feels like the display buffer isn't clearing instantly.

Context:

• This was NOT happening on Linux Mint (X11).
• I currently have intel-media-va-driver-non-free installed.
• I suspect it's a synchronization issue between the Intel i915 driver and the KWin Wayland compositor.

Kindly help me to solve this .

[claydoh]

Plasma is at least a litle more GPU-needy than Cinnamon, so have you tried allocating more memory to the graphics in your BIOS, if possible?

How was it doing before you added intel-media-va-driver-non-free? It might be worth checking that out, too, at least to eliminate some easy things. The non-free isn't necessarily better unless you need hardware video encoding which is the main or only difference. I am using it explicitly for the hardware video encoding, as I am ripping 1000+ DVDs on my Racoon box.

I haven't seen tearing on my weaker i5-7500T with the same graphics,though I do have more RAM.